还有一个解决方案

var a1 = [1, 2, 3, 4, 5]
var a2 = [2, 4]

检查a1是否包含a2的所有元素

var result = a1.filter(e => a2.indexOf(e) !== -1).length === a2.length
console.log(result)

香草js

/**
 * @description determine if an array contains one or more items from another array.
 * @param {array} haystack the array to search.
 * @param {array} arr the array providing items to check for in the haystack.
 * @return {boolean} true|false if haystack contains at least one item from arr.
 */
var findOne = function (haystack, arr) {
    return arr.some(function (v) {
        return haystack.indexOf(v) >= 0;
    });
};

正如@loganofsmyth所指出的，您可以在ES2016中将其缩短为

/**
 * @description determine if an array contains one or more items from another array.
 * @param {array} haystack the array to search.
 * @param {array} arr the array providing items to check for in the haystack.
 * @return {boolean} true|false if haystack contains at least one item from arr.
 */
const findOne = (haystack, arr) => {
    return arr.some(v => haystack.includes(v));
};

或者简单地称为arr.some（v＝＞haystalk.includes（v））；

如果要确定数组是否包含其他数组中的所有项，请将some（）替换为every（）或作为arr.every（v＝＞haystalk.includes（v））；

可以使用嵌套的Array.prototype.some调用。这有一个好处，即它将在第一场比赛中获胜，而不是其他将在整个嵌套循环中运行的解决方案。

eg.

var arr = [1, 2, 3];
var match = [2, 4];

var hasMatch = arr.some(a => match.some(m => a === m));

还有一个解决方案

var a1 = [1, 2, 3, 4, 5]
var a2 = [2, 4]

检查a1是否包含a2的所有元素

var result = a1.filter(e => a2.indexOf(e) !== -1).length === a2.length
console.log(result)

var target = ["apple","banana","orange"];
var checkArray = ["apple","banana","pineapple"];

var containsOneCommonItem = target.some(x => checkArray.some(y => y === x));`

["apple","grape"] //returns true;

["apple","banana","pineapple"] //returns true;

["grape", "pineapple"] //returns false;

不确定这在性能方面可能有多高效，但这就是我使用数组解构来保持一切美好和简短的原因：

const shareElements = (arr1, arr2) => {
  const typeArr = [...arr1, ...arr2]
  const typeSet = new Set(typeArr)
  return typeArr.length > typeSet.size
}

由于集合不能有重复的元素，而数组可以，因此组合两个输入数组，将其转换为集合，并比较集合大小和数组长度将告诉您它们是否共享任何元素。